diff options
Diffstat (limited to 'AppPkg/Applications/Python/Efi/getpath.c')
| -rw-r--r-- | AppPkg/Applications/Python/Efi/getpath.c | 788 |
1 files changed, 788 insertions, 0 deletions
diff --git a/AppPkg/Applications/Python/Efi/getpath.c b/AppPkg/Applications/Python/Efi/getpath.c new file mode 100644 index 0000000000..ba837bf522 --- /dev/null +++ b/AppPkg/Applications/Python/Efi/getpath.c @@ -0,0 +1,788 @@ +/** @file
+ Return the initial module search path.
+
+ Search in specified locations for the associated Python libraries.
+
+ Py_GetPath returns module_search_path.
+ Py_GetPrefix returns PREFIX
+ Py_GetExec_Prefix returns PREFIX
+ Py_GetProgramFullPath returns the full path to the python executable.
+
+ These are built dynamically so that the proper volume name can be prefixed
+ to the paths.
+
+ For the EDK II, UEFI, implementation of Python, PREFIX and EXEC_PREFIX
+ are set as follows:
+ PREFIX = /Efi/StdLib
+ EXEC_PREFIX = PREFIX
+
+ The following final paths are assumed:
+ /Efi/Tools/Python.efi The Python executable.
+ /Efi/StdLib/lib/python.VERSION The platform independent Python modules.
+ /Efi/StdLib/lib/python.VERSION/dynalib Dynamically loadable Python extension modules.
+
+ Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials are licensed and made available under
+ the terms and conditions of the BSD License that accompanies this distribution.
+ The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+**/
+#include <Python.h>
+#include <osdefs.h>
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/* VERSION must be at least two characters long. */
+#ifndef VERSION
+ #define VERSION "27"
+#endif
+
+#ifndef VPATH
+ #define VPATH "."
+#endif
+
+/* Search path entry delimiter */
+#ifdef DELIM
+ #define sDELIM ";"
+#endif
+
+#ifndef PREFIX
+ #define PREFIX "/Efi/StdLib"
+#endif
+
+#ifndef EXEC_PREFIX
+ #define EXEC_PREFIX PREFIX
+#endif
+
+#ifndef LIBPYTHON
+ #define LIBPYTHON "lib/python." VERSION
+#endif
+
+#ifndef PYTHONPATH
+//#define PYTHONPATH PREFIX LIBPYTHON sDELIM \
+// EXEC_PREFIX LIBPYTHON "/lib-dynload"
+ #define PYTHONPATH LIBPYTHON // sDELIM
+// LIBPYTHON "/lib-dynload"
+#endif
+
+#ifndef LANDMARK
+#define LANDMARK "os.py"
+#endif
+
+static char prefix[MAXPATHLEN+1];
+static char exec_prefix[MAXPATHLEN+1];
+static char progpath[MAXPATHLEN+1];
+static char *module_search_path = NULL;
+static char lib_python[] = LIBPYTHON;
+static char volume_name[32] = { 0 };
+
+/** Determine if "ch" is a separator character.
+
+ @param[in] ch The character to test.
+
+ @retval TRUE ch is a separator character.
+ @retval FALSE ch is NOT a separator character.
+**/
+static int
+is_sep(char ch)
+{
+#ifdef ALTSEP
+ return ch == SEP || ch == ALTSEP;
+#else
+ return ch == SEP;
+#endif
+}
+
+/** Reduce a path by its last element.
+
+ The last element (everything to the right of the last separator character)
+ in the path, dir, is removed from the path. Parameter dir is modified in place.
+
+ @param[in,out] dir Pointer to the path to modify.
+**/
+static void
+reduce(char *dir)
+{
+ size_t i = strlen(dir);
+ while (i > 0 && !is_sep(dir[i]))
+ --i;
+ dir[i] = '\0';
+}
+
+/** Does filename point to a file and not directory?
+
+ @param[in] filename The fully qualified path to the object to test.
+
+ @retval 0 Filename was not found, or is a directory.
+ @retval 1 Filename refers to a regular file.
+**/
+static int
+isfile(char *filename)
+{
+ struct stat buf;
+ if (stat(filename, &buf) != 0) {
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d] Not Found: file = \"%s\"\n", __func__, __LINE__, filename);
+ return 0;
+ }
+ //if (!S_ISREG(buf.st_mode))
+ if (S_ISDIR(buf.st_mode)) {
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d] Is DIR: file = \"%s\"\n", __func__, __LINE__, filename);
+ return 0;
+ }
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d] SUCCESS: file = \"%s\"\n", __func__, __LINE__, filename);
+ return 1;
+}
+
+/** Determine if filename refers to a Python module.
+
+ A Python module is indicated if the file exists, or if the file with
+ 'o' or 'c' appended exists.
+
+ @param[in] filename The fully qualified path to the object to test.
+
+ @retval 0
+**/
+static int
+ismodule(char *filename)
+{
+ if (isfile(filename)) {
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: file = \"%s\"\n", __func__, __LINE__, filename);
+ return 1;
+ }
+
+ /* Check for the compiled version of prefix. */
+ if (strlen(filename) < MAXPATHLEN) {
+ strcat(filename, Py_OptimizeFlag ? "o" : "c");
+ if (isfile(filename)) {
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: file = \"%s\"\n", __func__, __LINE__, filename);
+ return 1;
+ }
+ }
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d] FAIL: file = \"%s\"\n", __func__, __LINE__, filename);
+ return 0;
+}
+
+/** Does filename point to a directory?
+
+ @param[in] filename The fully qualified path to the object to test.
+
+ @retval 0 Filename was not found, or is not a regular file.
+ @retval 1 Filename refers to a directory.
+**/
+static int
+isdir(char *filename)
+{
+ struct stat buf;
+
+ if (stat(filename, &buf) != 0)
+ return 0;
+
+ if (!S_ISDIR(buf.st_mode))
+ return 0;
+
+ return 1;
+}
+
+/** Determine if a path is absolute, or not.
+ An absolute path consists of a volume name, "VOL:", followed by a rooted path,
+ "/path/elements". If both of these components are present, the path is absolute.
+
+ Let P be a pointer to the path to test.
+ Let A be a pointer to the first ':' in P.
+ Let B be a pointer to the first '/' or '\\' in P.
+
+ If A and B are not NULL
+ If (A-P+1) == (B-P) then the path is absolute.
+ Otherwise, the path is NOT absolute.
+
+ @param[in] path The path to test.
+
+ @retval -1 Path is absolute but lacking volume name.
+ @retval 0 Path is NOT absolute.
+ @retval 1 Path is absolute.
+*/
+static int
+is_absolute(char *path)
+{
+ char *A;
+ char *B;
+
+ A = strchr(path, ':');
+ B = strpbrk(path, "/\\");
+
+ if(B != NULL) {
+ if(A == NULL) {
+ if(B == path) {
+ return -1;
+ }
+ }
+ else {
+ if(((A - path) + 1) == (B - path)) {
+ return 1;
+ }
+ }
+ }
+ return 0;
+}
+
+
+/** Add a path component, by appending stuff to buffer.
+ buffer must have at least MAXPATHLEN + 1 bytes allocated, and contain a
+ NUL-terminated string with no more than MAXPATHLEN characters (not counting
+ the trailing NUL). It's a fatal error if it contains a string longer than
+ that (callers must be careful!). If these requirements are met, it's
+ guaranteed that buffer will still be a NUL-terminated string with no more
+ than MAXPATHLEN characters at exit. If stuff is too long, only as much of
+ stuff as fits will be appended.
+
+ @param[in,out] buffer The path to be extended.
+ @param[in] stuff The stuff to join onto the path.
+*/
+static void
+joinpath(char *buffer, char *stuff)
+{
+ size_t n, k;
+
+ k = 0;
+ if (is_absolute(stuff) == 1) {
+ n = 0;
+ }
+ else {
+ n = strlen(buffer);
+ if(n == 0) {
+ strncpy(buffer, volume_name, MAXPATHLEN);
+ n = strlen(buffer);
+ }
+ /* We must not use an else clause here because we want to test n again.
+ volume_name may have been empty.
+ */
+ if (n > 0 && n < MAXPATHLEN) {
+ if(!is_sep(buffer[n-1])) {
+ buffer[n++] = SEP;
+ }
+ if(is_sep(stuff[0])) ++stuff;
+ }
+ }
+ if (n > MAXPATHLEN)
+ Py_FatalError("buffer overflow in getpath.c's joinpath()");
+ k = strlen(stuff);
+ if (n + k > MAXPATHLEN)
+ k = MAXPATHLEN - n;
+ strncpy(buffer+n, stuff, k);
+ buffer[n+k] = '\0';
+}
+
+/** Is filename an executable file?
+
+ An executable file:
+ 1) exists
+ 2) is a file, not a directory
+ 3) has a name ending with ".efi"
+ 4) Only has a single '.' in the name.
+
+ If basename(filename) does not contain a '.', append ".efi" to filename
+ If filename ends in ".efi", it is executable, else it isn't.
+
+ This routine is used to when searching for the file named by argv[0].
+ As such, there is no need to search for extensions other than ".efi".
+
+ @param[in] filename The name of the file to test. It may, or may not, have an extension.
+
+ @retval 0 filename already has a path other than ".efi", or it doesn't exist, or is a directory.
+ @retval 1 filename refers to an executable file.
+**/
+static int
+isxfile(char *filename)
+{
+ struct stat buf;
+ char *bn;
+ char *newbn;
+ int bnlen;
+
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d] ENTER: file = \"%s\"\n", __func__, __LINE__, filename);
+ bn = basename(filename); // Separate off the file name component
+ reduce(filename); // and isolate the path component
+ bnlen = strlen(bn);
+ newbn = strrchr(bn, '.'); // Does basename contain a period?
+ if(newbn == NULL) { // Does NOT contain a period.
+ newbn = &bn[bnlen];
+ strncpyX(newbn, ".efi", MAXPATHLEN - bnlen); // append ".efi" to basename
+ bnlen += 4;
+ }
+ else if(strcmp(newbn, ".efi") != 0) {
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: Bad extension\n", __func__, __LINE__);
+ return 0; // File can not be executable.
+ }
+ joinpath(filename, bn); // Stitch path and file name back together
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: file = \"%s\"\n", __func__, __LINE__, filename);
+
+ if (stat(filename, &buf) != 0) { // Now, verify that file exists
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: Does not exist\n", __func__, __LINE__);
+ return 0;
+ }
+ if(S_ISDIR(buf.st_mode)) { // And it is not a directory.
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: Is a directory\n", __func__, __LINE__);
+ return 0;
+ }
+
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d] EXIT: file = \"%s\"\n", __func__, __LINE__, filename);
+ return 1;
+}
+
+/** Copy p into path, ensuring that the result is an absolute path.
+
+ copy_absolute requires that path be allocated at least
+ MAXPATHLEN + 1 bytes and that p be no more than MAXPATHLEN bytes.
+
+ @param[out] path Destination to receive the absolute path.
+ @param[in] p Path to be tested and possibly converted.
+**/
+static void
+copy_absolute(char *path, char *p)
+{
+ if (is_absolute(p) == 1)
+ strcpy(path, p);
+ else {
+ if (!getcwd(path, MAXPATHLEN)) {
+ /* unable to get the current directory */
+ if(volume_name[0] != 0) {
+ strcpy(path, volume_name);
+ joinpath(path, p);
+ }
+ else
+ strcpy(path, p);
+ return;
+ }
+ if (p[0] == '.' && is_sep(p[1]))
+ p += 2;
+ joinpath(path, p);
+ }
+}
+
+/** Modify path so that the result is an absolute path.
+ absolutize() requires that path be allocated at least MAXPATHLEN+1 bytes.
+
+ @param[in,out] path The path to be made absolute.
+*/
+static void
+absolutize(char *path)
+{
+ char buffer[MAXPATHLEN + 1];
+
+ if (is_absolute(path) == 1)
+ return;
+ copy_absolute(buffer, path);
+ strcpy(path, buffer);
+}
+
+/** Extract the volume name from a path.
+
+ @param[out] Dest Pointer to location in which to store the extracted volume name.
+ @param[in] path Pointer to the path to extract the volume name from.
+**/
+static void
+set_volume(char *Dest, char *path)
+{
+ size_t VolLen;
+
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d] ENTER: path = \"%s\"\n", __func__, __LINE__, path);
+ if(is_absolute(path)) {
+ VolLen = strcspn(path, "/\\:");
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: VolLen = %d\n", __func__, __LINE__, VolLen);
+ if((VolLen != 0) && (path[VolLen] == ':')) {
+ (void) strncpyX(Dest, path, VolLen + 1);
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: VolLen = %d, Dest = \"%s\" path = \"%s\"\n",
+ // __func__, __LINE__, VolLen, Dest, path);
+ }
+ }
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d] EXIT: Dest = \"%s\"\n", __func__, __LINE__, Dest);
+}
+
+
+/** Determine paths.
+
+ Two directories must be found, the platform independent directory
+ (prefix), containing the common .py and .pyc files, and the platform
+ dependent directory (exec_prefix), containing the shared library
+ modules. Note that prefix and exec_prefix are the same directory
+ for UEFI installations.
+
+ Separate searches are carried out for prefix and exec_prefix.
+ Each search tries a number of different locations until a ``landmark''
+ file or directory is found. If no prefix or exec_prefix is found, a
+ warning message is issued and the preprocessor defined PREFIX and
+ EXEC_PREFIX are used (even though they may not work); python carries on
+ as best as is possible, but some imports may fail.
+
+ Before any searches are done, the location of the executable is
+ determined. If argv[0] has one or more slashes in it, it is used
+ unchanged. Otherwise, it must have been invoked from the shell's path,
+ so we search %PATH% for the named executable and use that. If the
+ executable was not found on %PATH% (or there was no %PATH% environment
+ variable), the original argv[0] string is used.
+
+ Finally, argv0_path is set to the directory containing the executable
+ (i.e. the last component is stripped).
+
+ With argv0_path in hand, we perform a number of steps. The same steps
+ are performed for prefix and for exec_prefix, but with a different
+ landmark.
+
+ The prefix landmark will always be lib/python.VERSION/os.py and the
+ exec_prefix will always be lib/python.VERSION/dynaload, where VERSION
+ is Python's version number as defined at the beginning of this file.
+
+ First. See if the %PYTHONHOME% environment variable points to the
+ installed location of the Python libraries. If %PYTHONHOME% is set, then
+ it points to prefix and exec_prefix. %PYTHONHOME% can be a single
+ directory, which is used for both, or the prefix and exec_prefix
+ directories separated by the DELIM character.
+
+ Next. Search the directories pointed to by the preprocessor variables
+ PREFIX and EXEC_PREFIX. These paths are prefixed with the volume name
+ extracted from argv0_path. The volume names correspond to the UEFI
+ shell "map" names.
+
+ That's it!
+
+ Well, almost. Once we have determined prefix and exec_prefix, the
+ preprocessor variable PYTHONPATH is used to construct a path. Each
+ relative path on PYTHONPATH is prefixed with prefix. Then the directory
+ containing the shared library modules is appended. The environment
+ variable $PYTHONPATH is inserted in front of it all. Finally, the
+ prefix and exec_prefix globals are tweaked so they reflect the values
+ expected by other code, by stripping the "lib/python$VERSION/..." stuff
+ off. This seems to make more sense given that currently the only
+ known use of sys.prefix and sys.exec_prefix is for the ILU installation
+ process to find the installed Python tree.
+
+ The final, fully resolved, paths should look something like:
+ fs0:/Efi/Tools/python.efi
+ fs0:/Efi/StdLib/lib/python27
+ fs0:/Efi/StdLib/lib/python27/dynaload
+
+**/
+static void
+calculate_path(void)
+{
+ extern char *Py_GetProgramName(void);
+
+ static char delimiter[2] = {DELIM, '\0'};
+ static char separator[2] = {SEP, '\0'};
+ char *pythonpath = PYTHONPATH;
+ char *rtpypath = Py_GETENV("PYTHONPATH");
+ //char *home = Py_GetPythonHome();
+ char *path = getenv("PATH");
+ char *prog = Py_GetProgramName();
+ char argv0_path[MAXPATHLEN+1];
+ char zip_path[MAXPATHLEN+1];
+ //int pfound, efound; /* 1 if found; -1 if found build directory */
+ char *buf;
+ size_t bufsz;
+ size_t prefixsz;
+ char *defpath;
+ //uint32_t nsexeclength = MAXPATHLEN;
+
+ //unixify(path);
+ //unixify(rtpypath);
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]:\nENTER prog=\"%s\"\n path=\"%s\"\n", __func__, __LINE__, prog, path);
+
+
+/* ###########################################################################
+ Determine path to the Python.efi binary.
+ Produces progpath, argv0_path, and volume_name.
+########################################################################### */
+
+ /* If there is no slash in the argv0 path, then we have to
+ * assume python is on the user's $PATH, since there's no
+ * other way to find a directory to start the search from. If
+ * $PATH isn't exported, you lose.
+ */
+ if (strchr(prog, SEP))
+ strncpy(progpath, prog, MAXPATHLEN);
+ else if (path) {
+ while (1) {
+ char *delim = strchr(path, DELIM);
+
+ if (delim) {
+ size_t len = delim - path;
+ if (len > MAXPATHLEN)
+ len = MAXPATHLEN;
+ strncpy(progpath, path, len);
+ *(progpath + len) = '\0';
+ }
+ else
+ strncpy(progpath, path, MAXPATHLEN);
+
+ joinpath(progpath, prog);
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: progpath = \"%s\"\n", __func__, __LINE__, progpath);
+ if (isxfile(progpath))
+ break;
+
+ if (!delim) {
+ progpath[0] = '\0';
+ break;
+ }
+ path = delim + 1;
+ }
+ }
+ else
+ progpath[0] = '\0';
+ if ( (!is_absolute(progpath)) && (progpath[0] != '\0') )
+ absolutize(progpath);
+ strncpy(argv0_path, progpath, MAXPATHLEN);
+ argv0_path[MAXPATHLEN] = '\0';
+ set_volume(volume_name, argv0_path);
+
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: volume_name = \"%s\"\n", __func__, __LINE__, volume_name);
+ reduce(argv0_path);
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: progpath = \"%s\"\n", __func__, __LINE__, progpath);
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: argv0_path = \"%s\"\n", __func__, __LINE__, argv0_path);
+ /* At this point, argv0_path is guaranteed to be less than
+ MAXPATHLEN bytes long.
+ */
+
+/* ###########################################################################
+ Build the FULL prefix string, including volume name.
+ This is the full path to the platform independent libraries.
+########################################################################### */
+
+ //if (!(pfound = search_for_prefix(argv0_path, home))) {
+ // if (!Py_FrozenFlag)
+ // fprintf(stderr,
+ // "Could not find platform independent libraries <prefix>\n");
+ strncpy(prefix, volume_name, MAXPATHLEN);
+ joinpath(prefix, PREFIX);
+ joinpath(prefix, lib_python);
+ //}
+ //else
+ // reduce(prefix);
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: V = \"%s\", Prefix = \"%s\"\n", __func__, __LINE__, volume_name, prefix);
+
+/* ###########################################################################
+ Build the FULL path to the zipped-up Python library.
+########################################################################### */
+
+ strncpy(zip_path, prefix, MAXPATHLEN);
+ zip_path[MAXPATHLEN] = '\0';
+ //if (pfound > 0) { /* Use the reduced prefix returned by Py_GetPrefix() */
+ reduce(zip_path);
+ //reduce(zip_path);
+ //}
+ //else
+ // strncpy(zip_path, PREFIX, MAXPATHLEN);
+ joinpath(zip_path, "python00.zip");
+ bufsz = strlen(zip_path); /* Replace "00" with version */
+ zip_path[bufsz - 6] = VERSION[0];
+ zip_path[bufsz - 5] = VERSION[1];
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: Zip_path = \"%s\"\n", __func__, __LINE__, zip_path);
+
+/* ###########################################################################
+ Build the FULL path to dynamically loadable libraries.
+########################################################################### */
+
+ //if (!(efound = search_for_exec_prefix(argv0_path, home))) {
+ // if (!Py_FrozenFlag)
+ // fprintf(stderr,
+ // "Could not find platform dependent libraries <exec_prefix>\n");
+ strncpy(exec_prefix, volume_name, MAXPATHLEN);
+ joinpath(exec_prefix, EXEC_PREFIX);
+ joinpath(exec_prefix, lib_python);
+ joinpath(exec_prefix, "dynaload");
+ //}
+ /* If we found EXEC_PREFIX do *not* reduce it! (Yet.) */
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: Exec_prefix = \"%s\"\n", __func__, __LINE__, exec_prefix);
+
+ //if ((!pfound || !efound) && !Py_FrozenFlag)
+ // fprintf(stderr,
+ // "Consider setting $PYTHONHOME to <prefix>[%c<exec_prefix>]\n", DELIM);
+
+/* ###########################################################################
+ Build the module search path.
+########################################################################### */
+
+ /* Reduce prefix and exec_prefix to their essence,
+ * e.g. /usr/local/lib/python1.5 is reduced to /usr/local.
+ * If we're loading relative to the build directory,
+ * return the compiled-in defaults instead.
+ */
+ //if (pfound > 0) {
+ reduce(prefix);
+ reduce(prefix);
+ /* The prefix is the root directory, but reduce() chopped
+ * off the "/". */
+ if (!prefix[0]) {
+ strcpy(prefix, volume_name);
+ }
+ bufsz = strlen(prefix);
+ if(prefix[bufsz-1] == ':') {
+ prefix[bufsz] = SEP;
+ prefix[bufsz+1] = 0;
+ }
+ //}
+ //else
+ // strncpy(prefix, PREFIX, MAXPATHLEN);
+
+//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: prefix = \"%s\"\n", __func__, __LINE__, prefix);
+
+ /* Calculate size of return buffer.
+ */
+ defpath = pythonpath;
+ bufsz = 0;
+
+ if (rtpypath)
+ bufsz += strlen(rtpypath) + 1;
+
+ prefixsz = strlen(prefix) + 1;
+
+ while (1) {
+ char *delim = strchr(defpath, DELIM);
+
+ if (is_absolute(defpath) == 0)
+ /* Paths are relative to prefix */
+ bufsz += prefixsz;
+
+ if (delim)
+ bufsz += delim - defpath + 1;
+ else {
+ bufsz += strlen(defpath) + 1;
+ break;
+ }
+ defpath = delim + 1;
+ }
+//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: defpath = \"%s\"\n", __func__, __LINE__, defpath);
+
+ bufsz += strlen(zip_path) + 1;
+ bufsz += strlen(exec_prefix) + 1;
+
+ /* This is the only malloc call in this file */
+ buf = (char *)PyMem_Malloc(bufsz);
+
+ if (buf == NULL) {
+ /* We can't exit, so print a warning and limp along */
+ fprintf(stderr, "Not enough memory for dynamic PYTHONPATH.\n");
+ fprintf(stderr, "Using default static PYTHONPATH.\n");
+ module_search_path = PYTHONPATH;
+ }
+ else {
+ //if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]:\n", __func__, __LINE__);
+ /* Run-time value of $PYTHONPATH goes first */
+ if (rtpypath) {
+ strcpy(buf, rtpypath);
+ strcat(buf, delimiter);
+ }
+ else
+ buf[0] = '\0';
+//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: RTpath = \"%s\"\n", __func__, __LINE__, buf);
+
+ /* Next is the default zip path */
+ strcat(buf, zip_path);
+ strcat(buf, delimiter);
+//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: +Zip = \"%s\"\n", __func__, __LINE__, buf);
+
+ /* Next goes merge of compile-time $PYTHONPATH with
+ * dynamically located prefix.
+ */
+ defpath = pythonpath;
+ while (1) {
+ char *delim = strchr(defpath, DELIM);
+
+ if (is_absolute(defpath) != 1) {
+ strcat(buf, prefix);
+ strcat(buf, separator);
+ }
+
+ if (delim) {
+ size_t len = delim - defpath + 1;
+ size_t end = strlen(buf) + len;
+ strncat(buf, defpath, len);
+ *(buf + end) = '\0';
+ }
+ else {
+ strcat(buf, defpath);
+ break;
+ }
+ defpath = delim + 1;
+ }
+ strcat(buf, delimiter);
+//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: +Merge = \"%s\"\n", __func__, __LINE__, buf);
+
+ /* Finally, on goes the directory for dynamic-load modules */
+ strcat(buf, exec_prefix);
+
+ /* And publish the results */
+ module_search_path = buf;
+//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: module_search_path = \"%s\"\n", __func__, __LINE__, module_search_path);
+ }
+
+ //if (efound > 0) {
+ /* At this point, exec_prefix is set to VOL:/Efi/StdLib/lib/python.27/dynalib.
+ We want to get back to the root value, so we have to remove the final three
+ segments to get VOL:/Efi/StdLib. Because we don't know what VOL is, and
+ EXEC_PREFIX is also indeterminate, we just remove the three final segments.
+ */
+ reduce(exec_prefix);
+ reduce(exec_prefix);
+ reduce(exec_prefix);
+ if (!exec_prefix[0]) {
+ strcpy(exec_prefix, volume_name);
+ }
+ bufsz = strlen(exec_prefix);
+ if(exec_prefix[bufsz-1] == ':') {
+ exec_prefix[bufsz] = SEP;
+ exec_prefix[bufsz+1] = 0;
+ }
+ //}
+ //else
+ // strncpy(exec_prefix, EXEC_PREFIX, MAXPATHLEN);
+ if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: module_search_path = \"%s\"\n", __func__, __LINE__, module_search_path);
+ if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: prefix = \"%s\"\n", __func__, __LINE__, prefix);
+ if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: exec_prefix = \"%s\"\n", __func__, __LINE__, exec_prefix);
+ if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: progpath = \"%s\"\n", __func__, __LINE__, progpath);
+}
+
+
+/* External interface */
+
+char *
+Py_GetPath(void)
+{
+ if (!module_search_path)
+ calculate_path();
+ return module_search_path;
+}
+
+char *
+Py_GetPrefix(void)
+{
+ if (!module_search_path)
+ calculate_path();
+ return prefix;
+}
+
+char *
+Py_GetExecPrefix(void)
+{
+ if (!module_search_path)
+ calculate_path();
+ return exec_prefix;
+}
+
+char *
+Py_GetProgramFullPath(void)
+{
+ if (!module_search_path)
+ calculate_path();
+ return progpath;
+}
+
+
+#ifdef __cplusplus
+}
+#endif
+
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